Quarter	US dollars
2004-12-31	15
2005-03-31	13
2005-06-30	7
2005-09-30	7
2005-12-31	5
2006-03-31	2
2006-06-30	13
2006-09-30	13
2006-12-31	728
2007-03-31	728
2007-06-30	742
2007-09-30	795
2007-12-31	816
2008-03-31	827
2008-06-30	840
2008-09-30	820
2008-12-31	789
2009-03-31	752
2009-06-30	716
2009-09-30	680
2009-12-31	639
2010-03-31	617
2010-06-30	584
2010-09-30	572
2010-12-31	575
2011-03-31	563
2011-06-30	539
2011-09-30	537
2011-12-31	575
2012-03-31	591
2012-06-30	568
2012-09-30	535
2012-12-31	2
2013-03-31	2
2013-06-30	2
2013-09-30	5
2013-12-31	3
2014-03-31	3
2014-06-30	5
2014-09-30	8
2014-12-31	8
2015-03-31	6
2015-06-30	6
2015-09-30	11
2015-12-31	13
2016-03-31	13
2016-06-30	13
2016-09-30	12
2016-12-31	10
2017-03-31	9
2017-06-30	10
2017-09-30	28
2017-12-31	5
2018-03-31	3
2018-06-30	11
2018-09-30	1
2018-12-31	1
2019-03-31	1
2019-06-30	1
2019-09-30	1
2019-12-31	1
2020-03-31	1
2020-06-30	1
2020-09-30	1
2020-12-31	1
2021-03-31	1
2021-06-30	1
2021-09-30	1
2021-12-31	1
2022-03-31	1
2022-06-30	0
2022-09-30	1
2022-12-31	0
2023-03-31	1
2023-06-30	1
2023-09-30	1